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Abstract:

The present invention discloses a method for distributing and scheduling
wireless resources in an orthogonal frequency division multiplexing
system, including: a network side defining at least one short resource
unit, wherein, the short resource unit is less than a Resource Block (RB)
(201); an evolved Node B (eNB) selecting a short resource unit (202); and
the eNB distributing the wireless resources for a User Equipment (UE)
according to the selected short resource unit, and informing the UE of
scheduling information of the wireless resources (203). The present
invention also discloses a device for distributing and scheduling
wireless resources in an orthogonal frequency division multiplexing
system. With the present invention, more efficient resource allocation
can be provided for services with small data volume, so as to improve the
utilization ratio of wireless resources.

Claims:

1. A method for distributing and scheduling wireless resources in an
orthogonal frequency division multiplexing system, comprising: a network
side defining at least one short resource unit, wherein, the short
resource unit is less than a Resource Block (RB); an evolved Node B (eNB)
selecting a short resource unit; and the eNB allocating the wireless
resources for a User Equipment (UE) according to the selected short
resource unit, and informing the UE of scheduling information of the
wireless resources.

2. The method for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
1, wherein, defining the short resource unit specifically comprises: the
network side defining a minimum resource allocation granularity as that a
frequency domain width is 12 sub-carriers and a time domain width is one
symbol; when used for an uplink wireless resource allocation, the symbol
is a Single Carrier-Frequency Division Multiplex Access (SC-FDMA) symbol;
when used for a downlink wireless resource allocation, the symbol is an
Orthogonal Frequency Division Multiplexing (OFDM) symbol; the short
resource unit is a multiple of the minimum resource allocation
granularity.

3. The method for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
2, wherein, when the system uses a normal Cyclic Prefix (CP), a value of
the multiple is 1 to 13; when the system uses an extended CP, a value of
the multiple is 1 to 11.

4. The method for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
1, wherein, an eNB selecting a short resource unit specifically
comprises: the eNB selecting a short resource unit fixedly; or the eNB
selecting one short resource unit according to service data information,
Quality of Service (QoS) requirement and a wireless channel state of the
UE.

5. The method for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
1, wherein, when the eNB selects the short resource unit, the method
further comprises: the eNB following a principle of guaranteeing that one
short resource unit can bear a whole packet, or a principle of not
guaranteeing that one short resource unit can bear a whole packet, to
select the short resource unit.

6. The method for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
1, wherein, when a distributed mode is used in an allocation of the
wireless resources, the scheduling information of the wireless resources
comprises: a short resource unit serial number, resource initial position
information and resource bitmap information; and the resource initial
position information comprises: a serial number of an RB in which
wireless resources are located, or a serial number of an RB in which
wireless resources are located and a serial number of a symbol in which a
bitmap initial position is located on the RB; when a continuous mode is
used in an allocation of the wireless resources, the scheduling
information of the wireless resources comprises: a short resource unit
serial number, resource initial position information and a number of
resources; and the resource initial position information comprises: a
serial number of an RB in which a wireless resource initial position is
located, and a serial number of a symbol in which the wireless resource
initial position is located.

7. The method for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
6, wherein, informing the UE of the scheduling information of the
wireless resources is specifically: informing the UE of the scheduling
information of the wireless resources through a Physical Downlink Control
Channel (PDCCH), or Radio Resource Control (RRC) message, or a Media
Access Control (MAC) Control Element (CE).

8. The method for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
7, wherein, informing the UE of the scheduling information of the
wireless resources through the PDCCH is specifically: adding the
scheduling information of the wireless resources into PDCCH DCI format
message to send to the UE; or adding special PDCCH DCI format message to
carry the scheduling information of the wireless resources and sending to
the UE; or redefining fields related to scheduling of the wireless
resources in the PDCCH DCI format message to carry the scheduling
information of the wireless resources and sending to the UE.

9. A device for distributing and scheduling wireless resources in an
orthogonal frequency division multiplexing system, comprising: a resource
unit definition module, configured to define at least one short resource
unit which is less than an RB; a resource unit selection module,
configured to select a short resource unit; a resource
allocation/scheduling module, configured to allocate the wireless
resources for a User Equipment (UE) according to the selected short
resource unit, and inform the UE of scheduling information of the
wireless resources.

10. The device for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
9, wherein, the resource unit definition module is further configured to
define a minimum resource allocation granularity as that a frequency
domain width is 12 sub-carriers and a time domain width is one symbol;
and is further configured to define the short resource unit as a multiple
of the minimum resource allocation granularity; the resource unit
selection module is further configured to select a short resource unit
fixedly; or select a short resource unit according to service data
information, QoS requirement and a wireless channel state of the UE; and
the resource allocation/scheduling module is further configured to inform
the UE of the scheduling information of the wireless resources through a
PDCCH, or RRC message, or an MAC CE.

11. The method for distributing and scheduling the wireless resources in
the orthogonal frequency division multiplexing system according to claim
4, wherein, when the eNB selects the short resource unit, the method
further comprises: the eNB following a principle of guaranteeing that one
short resource unit can bear a whole packet, or a principle of not
guaranteeing that one short resource unit can bear a whole packet, to
select the short resource unit.

Description:

TECHNICAL FIELD

[0001] The present invention relates to the field of wireless
communication technology, and especially, to a method and device for
distributing and scheduling wireless resources in an orthogonal frequency
division multiplexing system.

BACKGROUND OF THE RELATED ART

[0002] In an Evolved Universal Terrestrial Radio Access Network (E-UTRAN)
of the 3rd generation mobile communication Long Term Evolution (LTE)
system, uplink data are transmitted through a Physical Uplink Shared
Channel (PUSCH), and downlink data are transmitted through a Physical
Downlink Shared Channel (PDSCH).

[0003] An Evolved NodeB (eNB) allocates uplink wireless resources to each
User Equipment (UE), which are used for uplink transmission, or
indicating at which downlink wireless resource the UE receives downlink
transmission.

[0004] The access technology used by LTE is the Orthogonal Frequency
Division Multiplexing (OFDM) technology. Compared with the 2nd generation
mobile communication system, the wireless resource management of LTE has
characteristics of wide bandwidth and multiple time processes, the
wireless resources thereof emerge in a bi-dimensional way of time and
frequency, and the number of users which can be borne greatly increases.

[0005] Resources in the LTE system take a Resource Block (RB), or called
as a Physical Resource Block (PRB), as a unit. The RB in uplink is
defined as that: one RB occupies 12 sub-carriers on the frequency domain
and 1 time slot on the time domain, that is, 7 Single Carrier-Frequency
Division Multiplex Access (SC-FDMA) symbols when using a Normal cyclic
prefix or 6 SC-FDMA symbols when using an Extended Cyclic Prefix (CP).

[0006] The definition of RB in the downlink is identical to that in the
uplink, one RB occupies 12 sub-carriers on the frequency domain and 1
time slot on the time domain, that is, 7 OFDM symbols when using the
normal CP or 6 OFDM symbols when using the extended CP.

[0007] One structure of the RB is as shown in FIG. 1, the minimum unit of
the resources is a Resource Element (RE), with the frequency domain width
being one sub-carrier and the time domain width being one symbol (which
refers to one SC-FDMA symbol in the uplink and one OFDM symbol in the
downlink); the frequency domain width of one RB is 12 sub-carriers and
the time domain width of one RB is 7 symbols.

[0008] The resource scheduling in the existing LTE system takes the RB as
the unit on the frequency domain and a subframe as the unit on the time
domain (one subframe corresponds to 2 time slots). It should be noted
that, even though the time domain width defined by a LTE protocol is one
time slot, in resource scheduling signaling of the LTE system, the
default time domain width of one RB is one subframe, that is to say, the
minimum resource scheduling granularity in the existing LTE system is 12
sub-carriers*1 subframe. This kind of resource scheduling granularity is
suited for current radio communication services, the communication
service with the minimum data volume is Voice over Internet Protocol
(VoIP) service currently, and a size of a single packet of the VoIP
service is about 40 bytes and needs to occupy about 1˜3 RBs.

[0009] However, with the development of the Internet of Things and the
introduction of Machine to Machine (M2M) service, a demand for a great
deal of small data volume transmission exists, such as services of
burglar alarm and remote meter reading and so on, the size of the packet
generated at a single time may only be several bytes or about ten bytes,
which is much smaller than the size of a single packet of the above VoIP
service. Therefore, when the existing LTE system bears this kind of
service, great waste of wireless resources will be generated for only a
little ratio of the distributed wireless resources is used, which causes
frequency spectrum efficiency of the whole system to decline seriously.

SUMMARY OF THE INVENTION

[0010] In view of this, the main object of the present invention is to
provide a method and device for distributing and scheduling wireless
resources in an orthogonal frequency division multiplexing system, and
provide more efficient resource allocation for services with small data
volume, so as to improve the utilization ratio of wireless resources.

[0011] In order to achieve the foregoing objects, the technical scheme of
the present invention is implemented as follows.

[0012] The present invention provides a method for distributing and
scheduling wireless resources in an orthogonal frequency division
multiplexing system, which comprises:

[0013] a network side defining at least one short resource unit, wherein,
the short resource unit is less than a Resource Block (RB);

[0014] an evolved Node B (eNB) selecting a short resource unit; and

[0015] the eNB allocating the wireless resources for a User Equipment (UE)
according to the selected short resource unit, and informing the UE of
scheduling information of the wireless resources.

[0017] the network side defining a minimum resource allocation granularity
as that a frequency domain width is 12 sub-carriers and a time domain
width is one symbol;

[0018] wherein, when used for the uplink wireless resource allocation, the
symbol is a Single Carrier-Frequency Division Multiplex Access (SC-FDMA)
symbol; when used for the downlink wireless resource allocation, the
symbol is an Orthogonal Frequency Division Multiplexing (OFDM) symbol;

[0019] wherein, the short resource unit is a multiple of the minimum
resource allocation granularity.

[0020] Furthermore, when a system uses a normal Cyclic Prefix (CP), a
value of the multiple is 1 to 13; when the system uses an extended CP, a
value of the multiple is 1 to 11.

[0022] the eNB selecting a short resource unit fixedly; or the eNB
selecting a short resource unit according to service data information,
Quality of Service (QoS) requirement and wireless channel state of the
UE.

[0023] Furthermore, when the eNB selecting the short resource unit, the
method further comprises:

[0024] the eNB selecting the short resource unit following a principle of
guaranteeing that one short resource unit can bear the whole packet, or a
principle of not guaranteeing that one short resource unit can bear the
whole packet.

[0025] Furthermore, when a distributed mode is used in the allocation of
the wireless resources, the scheduling information of the wireless
resources comprises: a short resource unit serial number, resource
initial position information and resource bitmap information; and the
resource initial position information comprises: a serial number of an RB
in which wireless resources are located, or a serial number of an RB in
which wireless resources are located and a serial number of a symbol in
which a bitmap initial position is located on the RB;

[0026] when a continuous mode is used in the allocation of the wireless
resources, the scheduling information of the wireless resources
comprises: a short resource unit serial number, resource initial position
information and the number of the resources; and the resource initial
position information comprises: a serial number of an RB in which a
wireless resource initial position is located, and a serial number of a
symbol in which the wireless resource initial position is located.

[0027] Furthermore, informing the UE of the scheduling information of the
wireless resources is specifically:

[0028] informing the UE of the scheduling information of the wireless
resources through a Physical Downlink Control Channel (PDCCH), or Radio
Resource Control (RRC) message, or a Media Access Control (MAC) Control
Element (CE).

[0029] Furthermore, informing the UE of the scheduling information of the
wireless resources through the PDCCH is specifically:

[0030] adding the scheduling information of the wireless resources into
PDCCH DCI format message to send to the UE; or

[0031] adding special PDCCH DCI format message to carry the scheduling
information of the wireless resources and sending to the UE; or

[0032] redefining fields related to scheduling of the wireless resources
in the PDCCH DCI format message to carry the scheduling information of
the wireless resources and sending to the UE.

[0033] The present invention further provides a device for distributing
and scheduling wireless resources in an orthogonal frequency division
multiplexing system, which comprises:

[0034] a resource unit definition module, configured to define at least
one short resource unit, wherein, the short resource unit is less than an
RB;

[0035] a resource unit selection module, configured to select a short
resource unit; and

[0036] a resource allocation/scheduling module, configured to allocate the
wireless resources for a User Equipment (UE) according to the selected
short resource unit, and inform the UE of scheduling information of the
wireless resources.

[0037] Wherein, the resource unit definition module is further configured
to define a minimum resource allocation granularity as that a frequency
domain width is 12 sub-carriers and a time domain width is one symbol;
and further configured to define the short resource unit as a multiple of
the minimum resource allocation granularity;

[0038] the resource unit selection module is further configured to select
a short resource unit fixedly; or select a short resource unit according
to service data information, QoS requirement and wireless channel state
of the UE; and

[0039] the resource allocation/scheduling module is further configured to
inform the UE of the scheduling information of the wireless resources
through a PDCCH, or RRC message, or a MAC CE.

[0040] With the scheme of wireless resource allocation of the present
invention, a resource unit, namely the short resource unit in the present
invention, is redefined. In the present invention, one minimum resource
allocation granularity is defined as that the frequency domain width is
12 sub-carriers and the time domain width is one symbol, which is far
less than one RB; and under a precondition of less than the RB, the short
resource unit is defined in the present invention as the multiple of the
minimum resource allocation granularity, such as 1˜13 times or
1˜11 times. Therefore, in practical applications, according to the
demand for data transmission volume, appropriate short resource units can
be flexibly used to perform data transmission, thus wireless resources
can be saved, and utilization ratio of the wireless resources and
frequency spectrum efficiency of the whole system can be improved.

BRIEF DESCRIPTION OF DRAWINGS

[0041] FIG. 1 is a schematic diagram of an RB in the existing LTE system.

[0042] FIG. 2 is a flow diagram of the method for distributing and
scheduling wireless resources according to the present invention.

[0043] FIG. 3 is a schematic diagram of example 1 of structure of the
short resource unit according to the present invention.

[0044] FIG. 4 is a schematic diagram of example 2 of structure of the
short resource unit according to the present invention.

[0045] FIG. 5 is a schematic diagram of allocating wireless resources in a
distributed mode according to the present invention.

[0046] FIG. 6 is a schematic diagram of allocating wireless resources in a
continuous mode according to the present invention.

[0047] FIG. 7 is a structure diagram of the device for distributing and
scheduling wireless resources according to the present invention.

PREFERRED EMBODIMENTS OF THE PRESENT INVENTION

[0048] The technical scheme of the present invention will be further
described in detail in combination with the accompany drawings and
specific examples below.

[0049] The main idea for distributing and scheduling wireless resources of
the present invention is as shown in FIG. 2, and following steps are
included.

[0050] In step 201, a network side defines at least one short resource
unit, and the short resource unit is less than a Resource Block (RB).

[0051] In order to improve the allocation efficiency of wireless resources
and guarantee a compatibility with the allocation of wireless resources
in the related art, the network side redefines a wireless resource unit
in the present invention, a characteristic of the redefined wireless
resource unit is that the wireless resource unit is must be less than a
wireless resource unit in the existing LTE system, namely the RB.
Therefore, the redefined wireless resource unit is called as a short
resource unit in the present invention, wherein, the network side can
define at least one short resource unit.

[0052] The definition of the short resource unit will be described through
specific examples below.

[0053] In the present invention, a minimum resource allocation granularity
is defined, a frequency domain width of the minimum resource allocation
granularity is 12 sub-carriers and a time domain width of the minimum
resource allocation granularity is one symbol (which refers to one
SC-FDMA symbol in the uplink and one OFDM symbol in the downlink).

[0054] Preferably, in order to furthest improve the allocation efficiency
of resources and guarantee a compatibility with the allocation of
wireless resources in the related art, the short resource unit can be the
minimum resource allocation granularity. Certainly, the definition of the
short resource unit also can have other ways, if a diversity of M2M
service is considered, the short resource unit also can be defined as a
multiple of the minimum resource allocation granularity, such as 2 times,
3 times and 4 times and so on, but the maximum can not exceed 14 times,
since the short resource unit of the present invention must be less than
the RB and the RB occupies one subframe on the time domain. When a normal
CP is used, one subframe is precisely 14 symbols; and when an extended CP
is used, one subframe is precisely 12 symbols. Therefore, in the present
invention, when the short resource unit is defined, the minimum resource
allocation granularity not more than 14 times in the normal CP and the
minimum resource allocation granularity not more than 12 times in the
extended CP are required.

[0055] The example of the short resource unit defined by the network side
is as shown in table 1.

[0056] It can be seen from table 1 that, with respect to the normal CP and
extended CP, the network side defines four short resource units
respectively. Therefore, in the actual use, an eNB can select one of the
four resource units above according to specific circumstances, which will
be described in the subsequent examples specifically.

[0057] When the normal CP is used, the structure of short resource unit 0
is as shown in FIG. 3 (a); and when the extended CP is used, the
structure of short resource unit 0 is as shown in FIG. 3 (b).

[0058] When the normal CP is used, the structure of short resource unit 2
is as shown in FIG. 4 (a); and when the extended CP is used, the
structure of short resource unit 2 is as shown in FIG. 4 (b).

[0059] In step 202, an eNB selects one short resource unit.

[0060] After the network side defines the short resource unit, the eNB
performs a selection of short resource units. Specifically, the eNB can
select one short resource unit fixedly, which is called as a static
selection method; and the eNB also can select one short resource unit
according to service data information, QoS requirement and wireless
channel state of a UE, which is called as a dynamic selection method.

[0061] If the eNB selects the short resource unit according to the service
data information, QoS requirement and wireless channel state of the UE
based on the short resource units provided by the table 1,

[0062] the service data information of the UE, namely a size of a service
packet, can be saved at the network side in advance, for example, saved
in subscription information of the services, thus, the information has
been already known by the eNB, or the information can also be reported by
the UE to a base station in communication process.

[0063] For example: there are three types of UEs within the coverage area
of the eNB, which are a normal cellphone, a portable health monitor and
an industrially produced pressure gage respectively. The eNB firstly
analyzes the service data information, QoS requirement and wireless
channel states of these three terminals as follows.

[0064] For the service data information: the normal cellphone supports a
VoIP service, and the size of a single packet of the VoIP service is 40
bytes and is reported once per 20 ms; the size of packet reported by the
portable health monitor each time is 20 bytes and is reported once per
second; and the size of a single packet of the industrially produced
pressure gage is 3 bytes and is reported once per 0.5 s.

[0065] For the wireless channel state: the normal cellphone and portable
health monitor both belong to mobile terminals, and a wireless channel of
the mobile terminal belongs to a time-varying channel; and the
industrially produced pressure gage belongs to a fixed terminal, and a
wireless channel of the fixed terminal is in a steady state.

[0066] For the QoS requirement: in the QoS requirement of the normal
cellphone, the requirement on error rate is relatively low, but the
requirement on scheduling delay is relatively high; and requirements of
the portable health monitor and industrially produced pressure gage on
the error rate are relatively high, but requirements on the scheduling
delay are relatively low.

[0067] The eNB takes the above information into the comprehensive
consideration to decide which kind of short resource unit is used for the
three kinds of UEs respectively.

[0068] For the normal cellphone, since the size of packet thereof belongs
to a relatively large category in small data services, the wireless
resource unit specified by the related art can still be used, that is,
the RB is taken as the unit to perform resource allocation.

[0069] For the portable health monitor, the size of packet thereof belongs
to a medium level in the small data services, the smaller wireless
resource unit can be used, and that is, the short resource unit of the
present invention is used. However, in consideration of that the QoS
thereof has a higher requirement on the error rate and what is used is a
time varying wireless channel, and also because the time varying wireless
channel means that a higher modulation encoding level (the modulation
encoding level refers to a modulation mode and an encoding rate used in
sending links, wherein, the modulation mode refers to QPSK modulation,
16QAM modulation and 64QAM modulation; the encoding rate refers to the
ratio of pre-encoded information bit length to encoded information bit
length and is a decimal between 0 and 1 normally; and the use of
modulation mode with higher order and encoding rate more closer to 1
represents that the modulation encoding level is more higher) can not be
used, a too small short resource unit is not suitable to be used. If
based on the table 1, the short resource unit of the serial number 3 can
be used, i.e. 12 sub-carriers*7 symbols.

[0070] For the industrially produced pressure gage, the size of packet
thereof belongs to an extreme small category in the small data services,
and the requirement on the error rate is higher. However, in
consideration of that the wireless channel state thereof is steady (which
means the higher modulation encoding level can be used), a smaller short
resource unit can be used, for example, the short resource unit of the
serial number 0 in table 1 is used.

[0071] In conclusion, when the eNB selects the short resource unit for the
UE with a short data service, one of the following two principles also
can be followed.

[0072] One, that one short resource unit can bear the whole packet is
guaranteed, thus it is not required to inform the UE of the number of the
allocated resources (for the number of resources is always 1), therefore,
the overhead of control signaling can be saved.

[0073] Two, that one short resource unit can bear the whole packet is not
guaranteed, thus it is required to inform the UE of the number of the
allocated resources, and the application is relatively flexible.

[0074] Certainly, when referring to the service data information, QoS
requirement and wireless channel state of the UE, or when selecting one
short resource unit fixedly, the eNB can also follow one of the above two
principles to select the short resource unit at the same time, and thus
the selected short resource unit will be more reasonable.

[0075] In step 203, the eNB allocates the wireless resources for the UE
according to the selected short resource unit, and informs the UE of
scheduling information of the wireless resources.

[0076] After the short resource unit is determined, the eNB determines the
allocated frequency domain position and time domain position, and the
modulation encoding level according to the wireless channel state of the
UE, the related art can be used for the specific implementation, which
will not be repeated here. Then, the eNB can determine the number of the
allocated short resources according to the service data information,
namely the size of service packet.

[0077] After allocation of the wireless resources is completed, the eNB
sends the scheduling information of the wireless resources to the UE. The
scheduling information of the wireless resources is different according
to a difference between allocation modes of the wireless resources.

[0078] For example, when a distributed mode is used in the allocation of
the wireless resources, and as shown FIG. 5, the scheduling information
of the wireless resources includes:

[0079] short resource unit information (mainly a short resource unit
serial number defined by the network side): in combination with table 1,
it can be known from FIG. 5 that the short resource unit information is
0;

[0080] resource initial position information (including a serial number of
an RB in which resources are located, or a serial number of an RB in
which resources are located and a serial number of a symbol corresponding
to a bitmap initial position on the RB): it can be known from FIG. 5 that
the serial number of the RB is 2 and the serial number of the symbol
corresponding to the bitmap initial position is 0;

[0081] resource bitmap information: 0101010000000 is obtained according to
FIG. 5, wherein, 1 indicates a position of an allocated resource.

[0082] When a continuous mode is used in the allocation of the wireless
resources, and as shown FIG. 6, the scheduling information of the
wireless resources includes:

[0083] short resource unit information (mainly a short resource unit
serial number defined by the network side): in combination with table 1,
it can be known from to FIG. 6 that the short resource unit information
is 2;

[0084] resource initial position information (including a serial number of
an RB in which a resource initial position is located, and a serial
number of a symbol in which the resource initial position is located): it
can be known from to FIG. 6 that the serial number of the RB is 1 and the
serial number of the symbol corresponding to the resource initial
position is 4;

[0085] the number of resources: 2.

[0086] The scheduling information of the wireless resources can be sent to
the UE through a Physical Downlink Control Channel (PDCCH), and also can
be sent to terminals through Radio Resource Control (RRC) message, or a
Media Access Control (MAC) Control Element (CE), namely MAC CE.

[0087] Wherein, when the scheduling information of the wireless resources
is sent to the UE through the PDCCH, following three modes can be used.

[0089] In Mode 2, special PDCCH DCI format message is added and used for
the resource scheduling of small data services, and the scheduling
information of the wireless resources is carried therein. Compared with
the existing PDCCH DCI format message in mode 1, the special PDCCH DCI
format message can be allowed to not carry length information of the RB.

[0090] For example, a PDCCH DCI format 0A message is added and used for
the resource scheduling of uplink small data services, wherein, the
scheduling information of the wireless resources can be defined in the
following ways:

[0091] 1. Short resource unit information;

[0092] 2. A serial number of an RB in which a resource initial position is
located;

[0093] 3. A serial number of a symbol in which a resource initial position
is located;

[0094] 4. the number of resources.

[0095] For example, a PDCCH DCI format 1E message is added and used for
the resource scheduling of downlink small data services, wherein, the
scheduling information of the wireless resources can be defined in the
following ways:

[0098] 3. If the continuous mode is used, the scheduling information
further including: [0099] 3.1. A serial number of an RB in which a
resource initial position is located; [0100] 3.2. A serial number of a
symbol in which a resource initial position is located; [0101] 3.3. the
number of resources;

[0102] 4. If the distributed mode is used, the scheduling information
further including: [0103] 4.1. A serial number of an RB in which
resources are located, or a serial number of an RB in which resources are
located and a serial number of a symbol in which a bitmap initial
position is located on the RB; [0104] 4.2. Resource bitmap information.

[0105] In Mode 3, fields related to the scheduling of the wireless
resources in the existing various PDCCH DCI format message are redefined
as the scheduling information of the wireless resources.

[0106] For example, the existing uplink resource scheduling signaling
PDCCH DCI format 0 is taken as an example:

[0107] 1. The information about whether it is used for resource scheduling
of small data services is added into the message;

[0108] 2. If it is used for the resource scheduling of the small data
services, the fields related to the scheduling information of the
wireless resources in the message are redefined, so as to make the fields
available for the resource scheduling of the small data services, for
example, mode 2 can be used, which will not be repeated here.

[0109] In order to implement the above method, the present invention
provides a device for distributing and scheduling wireless resources in
an orthogonal frequency division multiplexing system, and as shown in
FIG. 7, the device comprises:

[0110] a resource unit definition module 10, configured to define at least
one short resource unit, wherein, the short resource unit is less than an
RB;

[0111] a resource unit selection module 20, configured to select a short
resource unit; and

[0112] a resource allocation/scheduling module 30, configured to allocate
the wireless resources for a User Equipment (UE) according to the
selected short resource unit, and inform the UE of scheduling information
of the wireless resources.

[0113] Wherein, the resource unit definition module 10 is further
configured to: define a minimum resource allocation granularity with a
frequency domain width being 12 sub-carriers and a time domain width
being one symbol; and further configured to define the short resource
unit as a multiple of the minimum resource allocation granularity;

[0114] the resource unit selection module 20 is further configured to:
select a short resource unit fixedly; or select a short resource unit
according to service data information, QoS requirement and a wireless
channel state of the UE; and

[0115] the resource allocation/scheduling module 30 is further configured
to: inform the UE of the scheduling information of the wireless resources
through a PDCCH, or RRC message, or a MAC CE.

[0116] Wherein, the resource unit definition module 10 is applied in the
network side, and the resource unit selection module 20 and resource
allocation/scheduling module 30 are applied in a base station.

[0117] The above description is only the preferred examples of the present
invention, which is not used to limit the protection scope of the present
invention.